Hola Nick -
xxx
Any place where FAA written exams can be taken...
Is there a Flight Safety in UK...? -
If not, there is a FAA Office in Frankfurt, Germany.
I guess you must pay to do these exams nowadays.
xxx
For FAA Gnd Instructor, there are 3 tests to pass.
(1) Fundamentals of Instruction
(2) Basic Ground Instructor
(3) Instrument Ground Instructor
In the good old days, that was free.
xxx
Happy contrails